Development and Validation of Fiber Model for High-Strength Square Concrete-Filled Steel Tube Beam-Columns

ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Development and Validation of Fiber Model for High-Strength Square Concrete-Filled Steel Tube Beam-Columns

Author(s): Amit H. Varma, Richard Sause, James M. Ricles, and Qinggang Li

Publication: Structural Journal

Volume: 102

Issue: 1

Appears on pages(s): 73-85

Keywords: beam; column; high-strength concrete

Date: 1/1/2005

Abstract:
This paper presents the development and validation of a general fiber model that can be used to predict the monotonic and cyclic force-deformation behavior of high-strength square concrete-filled steel tube (CFT) beam-columns. The paper also presents a general analytical approach for developing the critical input parameters for the fiber model, that is, the stress-strain (s-e) curves for the fibers modeling the CFT cross section. This general approach develops the fiber s-e curves analytically from the results of a three-dimensional nonlinear finite element analysis of a corresponding CFT segment. The CFT fiber model and the analytical approach for developing the fiber s-e curves are validated using experimental results from 26 high-strength square CFT beam-column specimens tested under combined axial and monotonic or cyclic flexural loading in the U.S. and in Japan as part of the U.S.-Japan Cooperative Earthquake Research Program, Phase V.